IBM 6400 - Page 120

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Chapter 5 Troubleshooting Other Symptoms
Stacker motor check
NOTE: This procedure tests the four stacker motors and their
cables. You will usually be referred to this procedure from
other troubleshooting procedures. When you have
completed this procedure, return to the procedure that sent
you here.
1. a) Power off the printer.
b) Open the rear cabinet door.
c) Unfasten the cable clamp holding the stacker control panel
cables.
d) Disconnect stacker rail cable connector P107 from connector
J3 on the back of the stacker control panel. (See Figure 68,
page 376.)
e) Disconnect stacker frame cable connector P102 from
connector J4 on the rear of the stacker control panel. (See
Figure 68, page 376.)
f) Locate pin 1 of connector P102 and connector P107. (See the
cable assembly drawings in Appendix A, page 318 and page
321.)
g) Check both cables for pin damage, continuity, and shorts.
Check all motors for 15.2
±
1.5 Ohms on both phases. (Refer to
the power stacker control panel PCBA pinout drawing on page
298.)
2. Replace any cable that is damaged or fails continuity test.
Replace any motor that fails the resistance test.
Table 5. General Symptom List
Symptom Corrective Action